Type-writer escapement mechanism.



0. K. RAIN EY. TYPE WRITER ESGAPEMENT MECHANISM.

APPLIOAT ION FILED 0GT.19,1912.

Lmqmoaw Patented July 21, 1914 2 SHEBTSSHBET 1.

2 m M I 0. K. RAINEY. TYPE WRITER ESGAPEMENT MECHANISM. APPLICATION FILED OCT. 19, 1912.

I1 1 04 3 Patented July 21, 1914.

2 SHEETS-SHEET 2.

' CLIFTON K.-BAINEY, or BIRMINGHAM, anesanta.

TYPE-WRITER ESCABET/IENT MECHANISM.

inoaoos.

specification oillletters Patent.

iatented July 21', 191a.

I Application filed October 19, 1912., Serial E0. 326,838.

To all whom it mag concern:

Be it known that I, CLIFTON KJRAINEY, a citizen of the United States, residing at Birmingham," in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements 'in Type- Writer Escapement Mechanism; and I do hereby declare the following. clear, and exact description of the invention, such as will enable others k ll in t ar to which appertains to make and use the same.

My invention relates toa carriage escapement mechanism for typewriting, tabulating and other forms of vThe primary object of my invention is to provide an improved escapement which permits a swift and uninterrupted movement of the carriage inc dent to the successive formation of the letters or characters.

Another object ment mechanism of such construction as to positively stop the carriage at the completion of one letter space, thus obviating the possibility of the carriage moving more than one space during the single operation of a key lever.

Briefly stated, my inventijhn consists in rovidin coo eratln means for the es-. P a

capemcntwheel which shall continuously travel across the path of said wheel, and successively engage therewith in contradistinction to the pair of reciprocating'dogs commonly employed for ermitting an inte'rmittent movement ofsaid wheel.

Up to the present time, so far as I am aware, the desired movement of the carriage has been attained by means of the ordinary escapement .wheel' and rock arm carryingone or two dogs fixed or pivoted, which reciprocate across thepath of the escapement wheel. and alternately stop and release the same and consequently the carriage connected therewith. In ment, the shock incident to the stopping of the carriage at each letter space is delivered upon either a single dog orone of'a pair,-

and such excessive use of these parts causes them to be qu ckly worn and their action inaccurate because of the disturbing of their delicate adjustment. J

l. My invention contemplates a broad dearture fro'inthe old rocker motion where- I in is employedsa rotary element carrying a pluralityfof spring actuated dogs. adapted \to be partiallyrotated. upon. the operation of to be a full,-

recording machines,

is to provide an escapea the top plate these forms of escape Figure '1 is a vertical proved spacing wheel applied thereto. Figs. i

2 and 3 are fragmentary rear views, the first showing one. tooth of the escapement wheel engage against a pivoted dog, and the second showing during the reverse movement of the escape ment wheel. Fig. 4 is a side elevation of my improved spacing wheel taken on the line 4t4 of Fig. 1. Fig. 5 isa fragmentary view of the opposite side of the spacing wheel to that shown in Fig. 4.- Fig. 6 is a getail perspective view of one of the pivoted I ogs.

Referring to the drawings, 1 represents of the stationary frame of a the position of the pivoted dog typewriter and Q the shaft, carrying the usual escapei'nent wheel 3. The. escapement wheel is controlled by the spacing wheel 4, which may be conveniently placed upon the rocker shaft- 5 now generally employed upon iemington and other typewriting machines, for supporting the old form of rocking dog. The spacing wheel .4 is preferably located beneath the escapcment wheel-3v and is provided with a plurality of radially projecting spring actuated dogs 6, adapted to successively disengage and release one tooth of the escapement wheel 3 upon each operation of the key lever (not shown). Anchoring plates 7 aresecured to one face of thewheel 4 by screws .ing plates being bifurcated tongue extension 9 of the dogs 6. The;ad-

jacent ends of the plates 7and dogs 6 are 8, the outer ends of tlie'anehorto receive the connected by a pivot pin 10, inwardly of the dogs 6 project outwardly fromv the wheel t a distance substantially equal to the lengthof the teeth of the escapement wheel 3 and are normally advancing tooth of the escapement wheel by means of a spider spring, having the central portion 12 thereof secured against the "so that the a retained inclined toward the faceof the wheel 4' by screws 13 and the radially projecting arms 14 normally lying against the fiat surface 15 of the pivoted vention.

end of the dog,

As clearly illustrated in Figs. 1 and 2, the movement of a tooth of the escapement wheel against adog of the spacing wheel l causes the tension of the spring arm 14 to :be overcome and the dog to be engaged against the projecting flange 11 of the wheel 4. It will be further seen that the normal inclination of. the dogs 6 leaves sufiicient space between thedepressed dog and the ad jacent one for a tooth of the escapement wheel to pass therebetween when the spacing wheel 4: is rotated. a portion of a rerolution.

The usual connecting rod 15'is employed that connects the unlversal bar (not shown) with the escapement mechanism, and in this instance it is connected with a pitman 16 having a slot 17 therein working over the shaft 5. The pitman 16 is located upon the side of the spacing wheel 4 opposite that face to which the dogs Gare pivoted, and to this face of the -wheel is securedan annular rack 18 with which is adapted to cooperate the rigid dog 19, formed laterally upon the pitman 16, said pitman being normally retained in raised position by means of a compression spring 20. A. depression of the con- I necting rod 15 will cause the rigid dog 19 to engage one tooth of the annular rack 18 and I partially rotate the spacing wheel 4, and in order to prevent further rotation of said member 4, I provide a wedge shaped lug 21 at the upper end of the pitman 16 which enters between two teeth at the upper portion of the annular rack 18 at the end of the down stroke of the pitrnan. During the return stroke of the pitman, rotation of the wheel 4 is prevented by mcans of a spring dog 22. In order that the pitman 16 will readily ride over theteeth of the annular rack 18 upon-the up'st1'oke, a spring 23 is positioned over the shaft 5 and has itslop gposite ends bearing against said pitma n 16 and ,an adjustable collar 24 mounted over said shaft. T -50 I The teeth of the annular rack 18 are of such size and so arranged as to cause one pivoted dog.6 to pass by and release one tooth of the-escapement wheel 3 uponone operation of a key of a typewriter. While I have herein shown the pitman 16 con-' nected with aninclined connecting rod 15,

it'jwill be clearly'understood that said'rod "operation, of said member.

and pitrnan may be shifted to either a horizontal or vertical position without materi'ally changing the construction of my 1nvWhat I claim is:-

1.1.11 combination, a shaft, a spacing wheel thereon, an annular rack secured to one side ofsaid wheel, a. longitudinally slidable member mounted on said shaft, a laterally projecting tooth carried by said member engaging said rack, and awedge shape lug carried by said member adapted to engage between the teeth of said :rackduring the operation of said member. v I

2. In combination, a shaft, afwheel on said shaft, an annular rack projecting laterally from-said wheel, a member mounted on said shaft and having longitudinal, and transverse movement thereon, a. tooth carriedby' said member en a in said'racl: and means tending to move said tooth transversely said shaft having longitudinal and trans-- verse-movement thereon and adapted to cooperate with said rack to intermittently rotate said wheel, and means on said member adapted to lock said rack against rotation iubsequently to an operation of said mem- 5. In combination, a shaft, a Wheel on said shaft, an annular rack projectinglatera-11y from said wheel, a member mounted on said shaft having iongitudinal and transverse movement ther on' and adapted to cooperate with said rack to intermittently rotater said wheel, means tending to move said member transversely agamst said rack, and

means on saidmember adapted to locksaid rack against rotation subsequently to an In testimony whereof I have signed my name to this specification in the'presence of two subscribing witnesses. CLIFTON-K. RAiINEY. Witnesses; 1

Grins. P. Simeon), SA'ML W. CocKRELL. 

